Progenitor and Early Evolution of the Type IIb SN 2016gkg
- Creators
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Tartaglia, L.
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Fraser, M.
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Sand, D. J.
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Valenti, S.
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Smartt, S. J.
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McCully, C.
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Anderson, J. P.
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Arcavi, I.
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Elias-Rosa, N.
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Galbany, L.
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Gal-Yam, A.
- Haislip, J
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Hosseinzadeh, G.
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Howell, D. A.
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Inserra, C.
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Jha, S. W.
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Kankare, E.
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Lundqvist, P.
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Maguire, K.
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Mattila, S.
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Reichart, D.
- Smith, K. W.
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Smith, M.
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Stritzinger, M.
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Sullivan, M.
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Taddia, F.
- Tomasella, L.
Abstract
We report initial observations and analysis on the Type IIb SN 2016gkg in the nearby galaxy NGC 613. SN 2016gkg exhibited a clear double-peaked light curve during its early evolution, as evidenced by our intensive photometric follow-up campaign. SN 2016gkg shows strong similarities with other Type IIb SNe, in particular, with respect to the He I emission features observed in both the optical and near-infrared. SN 2016gkg evolved faster than the prototypical Type IIb SN 1993J, with a decline similar to that of SN 2011dh after the first peak. The analysis of archival Hubble Space Telescope images indicate a pre-explosion source at SN 2016gkg's position, suggesting a progenitor star with a ~mid-F spectral type and initial mass 15-20 M⊙, depending on the distance modulus adopted for NGC 613. Modeling the temperature evolution within 5 days of explosion, we obtain a progenitor radius of ~48-124 R⊙, smaller than that obtained from the analysis of the pre-explosion images (240-320 R⊙).
Additional Information
© 2017 The American Astronomical Society. Received 2016 November 2; revised 2017 January 11; accepted 2017 January 25; published 2017 February 10. Based on data from: ESO as part of PESSTO (197.D-1075.191.D-0935) and under programme 097.D-0762(A). Gemini Observatory under GS-2016B-Q-22 (PI: Sand). The Nordic Optical Telescope of the Instituto de Astrofísica de Canarias. The European Organisation for Astronomical Research in the southern hemisphere under ESO programme 198.A-0915(A). FOSCGUI is a graphic user interface aimed at extracting SN spectroscopy and photometry obtained with FOSC-like instruments, developed by E. Cappellaro. D.J.S. acknowledges NSF grants AST-1412504 and AST-1517649. S.J.S. acknowledges EU/FP7-ERC grant 29122. M.F. acknowledges the support of a Royal Society—Science Foundation Ireland University Research Fellowship. L.G. was supported in part by the US National Science Foundation under grant AST-1311862. M.S. acknowledges support from EU/FP7-ERC grant number 615929. K.M. acknowledges support from STFC through an Ernest Rutherford Fellowship. D.A.H., C.M., and G.H. are funded by NSF AST-1313484. Support for I.A. was provided by NASA through the Einstein Fellowship Program, grant PF6-170148. N.E.R. acknowledges financial support by the 1994 PRIN-INAF 2014 (project "Transient universe: unveiling new types of stellar explosions with PESSTO") and by MIUR PRIN 2010-2011, "The dark universe and the cosmic evolution of baryons: from current surveys to Euclid." M.S. acknowledges support from the Danish Agency for Science and Technology and Innovation via a Sapere Aude Level 2 grant, the Villum foundation, and the Instrumentcenter for Danish Astrophysics (IDA).Attached Files
Submitted - 1611.00419.pdf
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Additional details
- Eprint ID
- 95839
- Resolver ID
- CaltechAUTHORS:20190528-161442964
- AST-1412504
- NSF
- AST-1517649
- NSF
- 29122
- European Research Council (ERC)
- Royal Society
- Science Foundation Ireland
- AST-1311862
- NSF
- 615929
- European Research Council (ERC)
- Science and Technology Facilities Council (STFC)
- AST-1313484
- NSF
- PF6-170148
- NASA Einstein Fellowship
- Istituto Nazionale di Astrofisica (INAF)
- Danish Agency for Science and Technology and Innovation
- Villum Foundation
- Instrumentcenter for Danish Astrophysics
- Created
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2019-05-30Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Palomar Transient Factory